Can't Enter My PIN To Get A Tracker

Hi,
Today, i bought 2 boxes of cereal with the image of the tracker because i wanted to get a tracker. I tried to connect to enter the codes but I could'nt even if the date of the promotion is until the 31st of march. What is your solution for this problem? Thank you in advance for giving me an answer.

Hi, Aicha, thanks for reaching out to us. Due to the popularity of these promotions, all of the Special K* and Vector* Activity Trackers have been ordered. They were available while supplies last or until March 31st, 2016. We apologize for any disappointment caused by this. We invite you to stay tuned, as there are more exciting offers coming soon! Thank you for purchasing Kellogg's* products.